The exacted number sciences don't know.
The environment was a tropical ocean
Answer:
The answer should be AGE 7
Explanation:
At age 4 Children starts to understand death's entirety. Study reveals that at about age 3, 10 percent of children understand finality against 58 percent of 4-year-olds. As time goes on the remaining two facets of death are learned as time goes on at the age 7.
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots isos and topos, meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table.